This page describes experiments carried out to create an embedded video processing unit based on the OMAP3530 application processor from Texas Instruments using Gumstix Overo COMs. This is one branch of the [[Embedded Video Processing and Radio Unit]] project. Logbook is on the [[Talk:OMAP3530_VPU|talk page]].

+

This page describes experiments carried out to create an embedded video processing unit based on the OMAP3530 application processor from Texas Instruments using Gumstix Overo COMs. The work was done within the [[Embedded Video Processing and Radio Unit]] project and is now considered finished. Logbook is on the [[Talk:OMAP3530_VPU|talk page]].

+

+

Development continues in [[Romit2 VPU]].

== Obejctives ==

== Obejctives ==

Line 8:

Line 10:

== First flight on amateur rocket ==

== First flight on amateur rocket ==

The objectives of this flight are:

The objectives of this flight are:

−

# To test the Gumstix Overo Fire under high acceleration (TBD g)

+

# To test the Gumstix Overo Fire under high acceleration (6g)

# To capture images and/or video during the flight

# To capture images and/or video during the flight

Line 38:

Line 40:

The weight of electronics, camera, battery and wires not including the mounting hardware is approximately 200 grams.

The weight of electronics, camera, battery and wires not including the mounting hardware is approximately 200 grams.

−

=== Conclusions ===

+

=== Results & Conclusions ===

+

# We worked very well as a team

+

# Gumstix Overo Fire survived a crash landing from 500 meters (TBC if still working properly)

# For future UVC setups, a [http://guvcview.berlios.de/ guvcview]-like app to control all camera settings will be very useful.

# For future UVC setups, a [http://guvcview.berlios.de/ guvcview]-like app to control all camera settings will be very useful.

# The hacked USB OTG interface eliminating the powered hub did not work well. After a while, the pipeline would stop due to a device I/O error

# The hacked USB OTG interface eliminating the powered hub did not work well. After a while, the pipeline would stop due to a device I/O error

+

# The simple Gstreamer pipeline does not seem to be sufficient. While recording, every now and then there is a "jump" in the video suggesting that there is some performance issue somewhere (disk I/O, buffering?)

# When using SD cards, remember to add a piece of tape securing the card to the socket!

# When using SD cards, remember to add a piece of tape securing the card to the socket!

* [http://pixhawk.ethz.ch/wiki/start PIXHAWK] &ndash; Many useful BeagleBoard and Gumstix Overo COM related things. In particular, they seem to use similar cameras to those I got with the [[TMS320DM355_VPU|Leopard board]], see http://pixhawk.ethz.ch/wiki/pixhawk_camera_competition

* [http://pixhawk.ethz.ch/wiki/start PIXHAWK] &ndash; Many useful BeagleBoard and Gumstix Overo COM related things. In particular, they seem to use similar cameras to those I got with the [[TMS320DM355_VPU|Leopard board]], see http://pixhawk.ethz.ch/wiki/pixhawk_camera_competition

Latest revision as of 14:59, 17 September 2011

This page describes experiments carried out to create an embedded video processing unit based on the OMAP3530 application processor from Texas Instruments using Gumstix Overo COMs. The work was done within the Embedded Video Processing and Radio Unit project and is now considered finished. Logbook is on the talk page.

Obejctives

Compress and multiplex the videos with telemetry into a single transport stream suitable for transmission over the air

Process incoming telcommands

First flight on amateur rocket

The objectives of this flight are:

To test the Gumstix Overo Fire under high acceleration (6g)

To capture images and/or video during the flight

We learned about an opportunity to fly onboard an amateur rocket (up to 3 km high). Flight will take place on October 3, 2010. Time is very short so we will be focusing on getting the Gumstix Overo Fire up and running, and have it record video during the flight. No real time video downlink.

Power budget

Mass budget

The weight of electronics, camera, battery and wires not including the mounting hardware is approximately 200 grams.

Results & Conclusions

We worked very well as a team

Gumstix Overo Fire survived a crash landing from 500 meters (TBC if still working properly)

USB interface on Gusmtix Overo Fire is too slow for HD (even in MJPG mode). Max throughput appears to be around 10-15 Mbps.

For future UVC setups, a guvcview-like app to control all camera settings will be very useful.

The hacked USB OTG interface eliminating the powered hub did not work well. After a while, the pipeline would stop due to a device I/O error

The simple Gstreamer pipeline does not seem to be sufficient. While recording, every now and then there is a "jump" in the video suggesting that there is some performance issue somewhere (disk I/O, buffering?)

When using SD cards, remember to add a piece of tape securing the card to the socket!